tools/perf/util/parse-events.c

   1
   2 #include "../perf.h"
   3 #include "util.h"
   4 #include "parse-options.h"
   5 #include "parse-events.h"
   6 #include "exec_cmd.h"
   7 #include "string.h"
   8 #include "cache.h"
   9
  10 extern char *strcasestr(const char *haystack, const char *needle);
  11
  12 int                                     nr_counters;
  13
  14 struct perf_counter_attr                attrs[MAX_COUNTERS];
  15
  16 struct event_symbol {
  17         u8      type;
  18         u64     config;
  19         char    *symbol;
  20         char    *alias;
  21 };
  22
  23 char debugfs_path[MAXPATHLEN];
  24
  25 #define CHW(x) .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_##x
  26 #define CSW(x) .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_##x
  27
  28 static struct event_symbol event_symbols[] = {
  29   { CHW(CPU_CYCLES),            "cpu-cycles",           "cycles"        },
  30   { CHW(INSTRUCTIONS),          "instructions",         ""              },
  31   { CHW(CACHE_REFERENCES),      "cache-references",     ""              },
  32   { CHW(CACHE_MISSES),          "cache-misses",         ""              },
  33   { CHW(BRANCH_INSTRUCTIONS),   "branch-instructions",  "branches"      },
  34   { CHW(BRANCH_MISSES),         "branch-misses",        ""              },
  35   { CHW(BUS_CYCLES),            "bus-cycles",           ""              },
  36
  37   { CSW(CPU_CLOCK),             "cpu-clock",            ""              },
  38   { CSW(TASK_CLOCK),            "task-clock",           ""              },
  39   { CSW(PAGE_FAULTS),           "page-faults",          "faults"        },
  40   { CSW(PAGE_FAULTS_MIN),       "minor-faults",         ""              },
  41   { CSW(PAGE_FAULTS_MAJ),       "major-faults",         ""              },
  42   { CSW(CONTEXT_SWITCHES),      "context-switches",     "cs"            },
  43   { CSW(CPU_MIGRATIONS),        "cpu-migrations",       "migrations"    },
  44 };
  45
  46 #define __PERF_COUNTER_FIELD(config, name) \
  47         ((config & PERF_COUNTER_##name##_MASK) >> PERF_COUNTER_##name##_SHIFT)
  48
  49 #define PERF_COUNTER_RAW(config)        __PERF_COUNTER_FIELD(config, RAW)
  50 #define PERF_COUNTER_CONFIG(config)     __PERF_COUNTER_FIELD(config, CONFIG)
  51 #define PERF_COUNTER_TYPE(config)       __PERF_COUNTER_FIELD(config, TYPE)
  52 #define PERF_COUNTER_ID(config)         __PERF_COUNTER_FIELD(config, EVENT)
  53
  54 static char *hw_event_names[] = {
  55         "cycles",
  56         "instructions",
  57         "cache-references",
  58         "cache-misses",
  59         "branches",
  60         "branch-misses",
  61         "bus-cycles",
  62 };
  63
  64 static char *sw_event_names[] = {
  65         "cpu-clock-msecs",
  66         "task-clock-msecs",
  67         "page-faults",
  68         "context-switches",
  69         "CPU-migrations",
  70         "minor-faults",
  71         "major-faults",
  72 };
  73
  74 #define MAX_ALIASES 8
  75
  76 static char *hw_cache[][MAX_ALIASES] = {
  77  { "L1-dcache", "l1-d",         "l1d",          "L1-data",              },
  78  { "L1-icache", "l1-i",         "l1i",          "L1-instruction",       },
  79  { "LLC",       "L2"                                                    },
  80  { "dTLB",      "d-tlb",        "Data-TLB",                             },
  81  { "iTLB",      "i-tlb",        "Instruction-TLB",                      },
  82  { "branch",    "branches",     "bpu",          "btb",          "bpc",  },
  83 };
  84
  85 static char *hw_cache_op[][MAX_ALIASES] = {
  86  { "load",      "loads",        "read",                                 },
  87  { "store",     "stores",       "write",                                },
  88  { "prefetch",  "prefetches",   "speculative-read", "speculative-load", },
  89 };
  90
  91 static char *hw_cache_result[][MAX_ALIASES] = {
  92  { "refs",      "Reference",    "ops",          "access",               },
  93  { "misses",    "miss",                                                 },
  94 };
  95
  96 #define C(x)            PERF_COUNT_HW_CACHE_##x
  97 #define CACHE_READ      (1 << C(OP_READ))
  98 #define CACHE_WRITE     (1 << C(OP_WRITE))
  99 #define CACHE_PREFETCH  (1 << C(OP_PREFETCH))
 100 #define COP(x)          (1 << x)
 101
 102 /*
 103  * cache operartion stat
 104  * L1I : Read and prefetch only
 105  * ITLB and BPU : Read-only
 106  */
 107 static unsigned long hw_cache_stat[C(MAX)] = {
 108  [C(L1D)]       = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
 109  [C(L1I)]       = (CACHE_READ | CACHE_PREFETCH),
 110  [C(LL)]        = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
 111  [C(DTLB)]      = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
 112  [C(ITLB)]      = (CACHE_READ),
 113  [C(BPU)]       = (CACHE_READ),
 114 };
 115
 116 #define for_each_subsystem(sys_dir, sys_dirent, sys_next, file, st)            \
 117         while (!readdir_r(sys_dir, &sys_dirent, &sys_next) && sys_next)        \
 118         if (snprintf(file, MAXPATHLEN, "%s/%s", debugfs_path,                  \
 119                         sys_dirent.d_name) &&                                  \
 120            (!stat(file, &st)) && (S_ISDIR(st.st_mode)) &&                      \
 121            (strcmp(sys_dirent.d_name, ".")) &&                                 \
 122            (strcmp(sys_dirent.d_name, "..")))
 123
 124 static int tp_event_has_id(struct dirent *sys_dir, struct dirent *evt_dir)
 125 {
 126         char evt_path[MAXPATHLEN];
 127         int fd;
 128
 129         snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", debugfs_path,
 130                         sys_dir->d_name, evt_dir->d_name);
 131         fd = open(evt_path, O_RDONLY);
 132         if (fd < 0)
 133                 return -EINVAL;
 134         close(fd);
 135
 136         return 0;
 137 }
 138
 139 #define for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next, file, st)    \
 140         while (!readdir_r(evt_dir, &evt_dirent, &evt_next) && evt_next)        \
 141         if (snprintf(file, MAXPATHLEN, "%s/%s/%s", debugfs_path,               \
 142                      sys_dirent.d_name, evt_dirent.d_name) &&                  \
 143            (!stat(file, &st)) && (S_ISDIR(st.st_mode)) &&                      \
 144            (strcmp(evt_dirent.d_name, ".")) &&                                 \
 145            (strcmp(evt_dirent.d_name, "..")) &&                                \
 146            (!tp_event_has_id(&sys_dirent, &evt_dirent)))
 147
 148 #define MAX_EVENT_LENGTH 30
 149
 150 int valid_debugfs_mount(const char *debugfs)
 151 {
 152         struct statfs st_fs;
 153
 154         if (statfs(debugfs, &st_fs) < 0)
 155                 return -ENOENT;
 156         else if (st_fs.f_type != (long) DEBUGFS_MAGIC)
 157                 return -ENOENT;
 158         return 0;
 159 }
 160
 161 static char *tracepoint_id_to_name(u64 config)
 162 {
 163         static char tracepoint_name[2 * MAX_EVENT_LENGTH];
 164         DIR *sys_dir, *evt_dir;
 165         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
 166         struct stat st;
 167         char id_buf[4];
 168         int fd;
 169         u64 id;
 170         char evt_path[MAXPATHLEN];
 171
 172         if (valid_debugfs_mount(debugfs_path))
 173                 return "unkown";
 174
 175         sys_dir = opendir(debugfs_path);
 176         if (!sys_dir)
 177                 goto cleanup;
 178
 179         for_each_subsystem(sys_dir, sys_dirent, sys_next, evt_path, st) {
 180                 evt_dir = opendir(evt_path);
 181                 if (!evt_dir)
 182                         goto cleanup;
 183                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next,
 184                                                                 evt_path, st) {
 185                         snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id",
 186                                  debugfs_path, sys_dirent.d_name,
 187                                  evt_dirent.d_name);
 188                         fd = open(evt_path, O_RDONLY);
 189                         if (fd < 0)
 190                                 continue;
 191                         if (read(fd, id_buf, sizeof(id_buf)) < 0) {
 192                                 close(fd);
 193                                 continue;
 194                         }
 195                         close(fd);
 196                         id = atoll(id_buf);
 197                         if (id == config) {
 198                                 closedir(evt_dir);
 199                                 closedir(sys_dir);
 200                                 snprintf(tracepoint_name, 2 * MAX_EVENT_LENGTH,
 201                                         "%s:%s", sys_dirent.d_name,
 202                                         evt_dirent.d_name);
 203                                 return tracepoint_name;
 204                         }
 205                 }
 206                 closedir(evt_dir);
 207         }
 208
 209 cleanup:
 210         closedir(sys_dir);
 211         return "unkown";
 212 }
 213
 214 static int is_cache_op_valid(u8 cache_type, u8 cache_op)
 215 {
 216         if (hw_cache_stat[cache_type] & COP(cache_op))
 217                 return 1;       /* valid */
 218         else
 219                 return 0;       /* invalid */
 220 }
 221
 222 static char *event_cache_name(u8 cache_type, u8 cache_op, u8 cache_result)
 223 {
 224         static char name[50];
 225
 226         if (cache_result) {
 227                 sprintf(name, "%s-%s-%s", hw_cache[cache_type][0],
 228                         hw_cache_op[cache_op][0],
 229                         hw_cache_result[cache_result][0]);
 230         } else {
 231                 sprintf(name, "%s-%s", hw_cache[cache_type][0],
 232                         hw_cache_op[cache_op][1]);
 233         }
 234
 235         return name;
 236 }
 237
 238 char *event_name(int counter)
 239 {
 240         u64 config = attrs[counter].config;
 241         int type = attrs[counter].type;
 242
 243         return __event_name(type, config);
 244 }
 245
 246 char *__event_name(int type, u64 config)
 247 {
 248         static char buf[32];
 249
 250         if (type == PERF_TYPE_RAW) {
 251                 sprintf(buf, "raw 0x%llx", config);
 252                 return buf;
 253         }
 254
 255         switch (type) {
 256         case PERF_TYPE_HARDWARE:
 257                 if (config < PERF_COUNT_HW_MAX)
 258                         return hw_event_names[config];
 259                 return "unknown-hardware";
 260
 261         case PERF_TYPE_HW_CACHE: {
 262                 u8 cache_type, cache_op, cache_result;
 263
 264                 cache_type   = (config >>  0) & 0xff;
 265                 if (cache_type > PERF_COUNT_HW_CACHE_MAX)
 266                         return "unknown-ext-hardware-cache-type";
 267
 268                 cache_op     = (config >>  8) & 0xff;
 269                 if (cache_op > PERF_COUNT_HW_CACHE_OP_MAX)
 270                         return "unknown-ext-hardware-cache-op";
 271
 272                 cache_result = (config >> 16) & 0xff;
 273                 if (cache_result > PERF_COUNT_HW_CACHE_RESULT_MAX)
 274                         return "unknown-ext-hardware-cache-result";
 275
 276                 if (!is_cache_op_valid(cache_type, cache_op))
 277                         return "invalid-cache";
 278
 279                 return event_cache_name(cache_type, cache_op, cache_result);
 280         }
 281
 282         case PERF_TYPE_SOFTWARE:
 283                 if (config < PERF_COUNT_SW_MAX)
 284                         return sw_event_names[config];
 285                 return "unknown-software";
 286
 287         case PERF_TYPE_TRACEPOINT:
 288                 return tracepoint_id_to_name(config);
 289
 290         default:
 291                 break;
 292         }
 293
 294         return "unknown";
 295 }
 296
 297 static int parse_aliases(const char **str, char *names[][MAX_ALIASES], int size)
 298 {
 299         int i, j;
 300         int n, longest = -1;
 301
 302         for (i = 0; i < size; i++) {
 303                 for (j = 0; j < MAX_ALIASES && names[i][j]; j++) {
 304                         n = strlen(names[i][j]);
 305                         if (n > longest && !strncasecmp(*str, names[i][j], n))
 306                                 longest = n;
 307                 }
 308                 if (longest > 0) {
 309                         *str += longest;
 310                         return i;
 311                 }
 312         }
 313
 314         return -1;
 315 }
 316
 317 static int
 318 parse_generic_hw_event(const char **str, struct perf_counter_attr *attr)
 319 {
 320         const char *s = *str;
 321         int cache_type = -1, cache_op = -1, cache_result = -1;
 322
 323         cache_type = parse_aliases(&s, hw_cache, PERF_COUNT_HW_CACHE_MAX);
 324         /*
 325          * No fallback - if we cannot get a clear cache type
 326          * then bail out:
 327          */
 328         if (cache_type == -1)
 329                 return 0;
 330
 331         while ((cache_op == -1 || cache_result == -1) && *s == '-') {
 332                 ++s;
 333
 334                 if (cache_op == -1) {
 335                         cache_op = parse_aliases(&s, hw_cache_op,
 336                                                 PERF_COUNT_HW_CACHE_OP_MAX);
 337                         if (cache_op >= 0) {
 338                                 if (!is_cache_op_valid(cache_type, cache_op))
 339                                         return 0;
 340                                 continue;
 341                         }
 342                 }
 343
 344                 if (cache_result == -1) {
 345                         cache_result = parse_aliases(&s, hw_cache_result,
 346                                                 PERF_COUNT_HW_CACHE_RESULT_MAX);
 347                         if (cache_result >= 0)
 348                                 continue;
 349                 }
 350
 351                 /*
 352                  * Can't parse this as a cache op or result, so back up
 353                  * to the '-'.
 354                  */
 355                 --s;
 356                 break;
 357         }
 358
 359         /*
 360          * Fall back to reads:
 361          */
 362         if (cache_op == -1)
 363                 cache_op = PERF_COUNT_HW_CACHE_OP_READ;
 364
 365         /*
 366          * Fall back to accesses:
 367          */
 368         if (cache_result == -1)
 369                 cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
 370
 371         attr->config = cache_type | (cache_op << 8) | (cache_result << 16);
 372         attr->type = PERF_TYPE_HW_CACHE;
 373
 374         *str = s;
 375         return 1;
 376 }
 377
 378 static int parse_tracepoint_event(const char **strp,
 379                                     struct perf_counter_attr *attr)
 380 {
 381         const char *evt_name;
 382         char *flags;
 383         char sys_name[MAX_EVENT_LENGTH];
 384         char id_buf[4];
 385         int fd;
 386         unsigned int sys_length, evt_length;
 387         u64 id;
 388         char evt_path[MAXPATHLEN];
 389
 390         if (valid_debugfs_mount(debugfs_path))
 391                 return 0;
 392
 393         evt_name = strchr(*strp, ':');
 394         if (!evt_name)
 395                 return 0;
 396
 397         sys_length = evt_name - *strp;
 398         if (sys_length >= MAX_EVENT_LENGTH)
 399                 return 0;
 400
 401         strncpy(sys_name, *strp, sys_length);
 402         sys_name[sys_length] = '\0';
 403         evt_name = evt_name + 1;
 404
 405         flags = strchr(evt_name, ':');
 406         if (flags) {
 407                 *flags = '\0';
 408                 flags++;
 409                 if (!strncmp(flags, "record", strlen(flags)))
 410                         attr->sample_type |= PERF_SAMPLE_RAW;
 411         }
 412
 413         evt_length = strlen(evt_name);
 414         if (evt_length >= MAX_EVENT_LENGTH)
 415                 return 0;
 416
 417         snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", debugfs_path,
 418                  sys_name, evt_name);
 419         fd = open(evt_path, O_RDONLY);
 420         if (fd < 0)
 421                 return 0;
 422
 423         if (read(fd, id_buf, sizeof(id_buf)) < 0) {
 424                 close(fd);
 425                 return 0;
 426         }
 427         close(fd);
 428         id = atoll(id_buf);
 429         attr->config = id;
 430         attr->type = PERF_TYPE_TRACEPOINT;
 431         *strp = evt_name + evt_length;
 432         return 1;
 433 }
 434
 435 static int check_events(const char *str, unsigned int i)
 436 {
 437         int n;
 438
 439         n = strlen(event_symbols[i].symbol);
 440         if (!strncmp(str, event_symbols[i].symbol, n))
 441                 return n;
 442
 443         n = strlen(event_symbols[i].alias);
 444         if (n)
 445                 if (!strncmp(str, event_symbols[i].alias, n))
 446                         return n;
 447         return 0;
 448 }
 449
 450 static int
 451 parse_symbolic_event(const char **strp, struct perf_counter_attr *attr)
 452 {
 453         const char *str = *strp;
 454         unsigned int i;
 455         int n;
 456
 457         for (i = 0; i < ARRAY_SIZE(event_symbols); i++) {
 458                 n = check_events(str, i);
 459                 if (n > 0) {
 460                         attr->type = event_symbols[i].type;
 461                         attr->config = event_symbols[i].config;
 462                         *strp = str + n;
 463                         return 1;
 464                 }
 465         }
 466         return 0;
 467 }
 468
 469 static int parse_raw_event(const char **strp, struct perf_counter_attr *attr)
 470 {
 471         const char *str = *strp;
 472         u64 config;
 473         int n;
 474
 475         if (*str != 'r')
 476                 return 0;
 477         n = hex2u64(str + 1, &config);
 478         if (n > 0) {
 479                 *strp = str + n + 1;
 480                 attr->type = PERF_TYPE_RAW;
 481                 attr->config = config;
 482                 return 1;
 483         }
 484         return 0;
 485 }
 486
 487 static int
 488 parse_numeric_event(const char **strp, struct perf_counter_attr *attr)
 489 {
 490         const char *str = *strp;
 491         char *endp;
 492         unsigned long type;
 493         u64 config;
 494
 495         type = strtoul(str, &endp, 0);
 496         if (endp > str && type < PERF_TYPE_MAX && *endp == ':') {
 497                 str = endp + 1;
 498                 config = strtoul(str, &endp, 0);
 499                 if (endp > str) {
 500                         attr->type = type;
 501                         attr->config = config;
 502                         *strp = endp;
 503                         return 1;
 504                 }
 505         }
 506         return 0;
 507 }
 508
 509 static int
 510 parse_event_modifier(const char **strp, struct perf_counter_attr *attr)
 511 {
 512         const char *str = *strp;
 513         int eu = 1, ek = 1, eh = 1;
 514
 515         if (*str++ != ':')
 516                 return 0;
 517         while (*str) {
 518                 if (*str == 'u')
 519                         eu = 0;
 520                 else if (*str == 'k')
 521                         ek = 0;
 522                 else if (*str == 'h')
 523                         eh = 0;
 524                 else
 525                         break;
 526                 ++str;
 527         }
 528         if (str >= *strp + 2) {
 529                 *strp = str;
 530                 attr->exclude_user   = eu;
 531                 attr->exclude_kernel = ek;
 532                 attr->exclude_hv     = eh;
 533                 return 1;
 534         }
 535         return 0;
 536 }
 537
 538 /*
 539  * Each event can have multiple symbolic names.
 540  * Symbolic names are (almost) exactly matched.
 541  */
 542 static int parse_event_symbols(const char **str, struct perf_counter_attr *attr)
 543 {
 544         if (!(parse_tracepoint_event(str, attr) ||
 545               parse_raw_event(str, attr) ||
 546               parse_numeric_event(str, attr) ||
 547               parse_symbolic_event(str, attr) ||
 548               parse_generic_hw_event(str, attr)))
 549                 return 0;
 550
 551         parse_event_modifier(str, attr);
 552
 553         return 1;
 554 }
 555
 556 int parse_events(const struct option *opt __used, const char *str, int unset __used)
 557 {
 558         struct perf_counter_attr attr;
 559
 560         for (;;) {
 561                 if (nr_counters == MAX_COUNTERS)
 562                         return -1;
 563
 564                 memset(&attr, 0, sizeof(attr));
 565                 if (!parse_event_symbols(&str, &attr))
 566                         return -1;
 567
 568                 if (!(*str == 0 || *str == ',' || isspace(*str)))
 569                         return -1;
 570
 571                 attrs[nr_counters] = attr;
 572                 nr_counters++;
 573
 574                 if (*str == 0)
 575                         break;
 576                 if (*str == ',')
 577                         ++str;
 578                 while (isspace(*str))
 579                         ++str;
 580         }
 581
 582         return 0;
 583 }
 584
 585 static const char * const event_type_descriptors[] = {
 586         "",
 587         "Hardware event",
 588         "Software event",
 589         "Tracepoint event",
 590         "Hardware cache event",
 591 };
 592
 593 /*
 594  * Print the events from <debugfs_mount_point>/tracing/events
 595  */
 596
 597 static void print_tracepoint_events(void)
 598 {
 599         DIR *sys_dir, *evt_dir;
 600         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
 601         struct stat st;
 602         char evt_path[MAXPATHLEN];
 603
 604         if (valid_debugfs_mount(debugfs_path))
 605                 return;
 606
 607         sys_dir = opendir(debugfs_path);
 608         if (!sys_dir)
 609                 goto cleanup;
 610
 611         for_each_subsystem(sys_dir, sys_dirent, sys_next, evt_path, st) {
 612                 evt_dir = opendir(evt_path);
 613                 if (!evt_dir)
 614                         goto cleanup;
 615                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next,
 616                                                                 evt_path, st) {
 617                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
 618                                  sys_dirent.d_name, evt_dirent.d_name);
 619                         fprintf(stderr, "  %-40s [%s]\n", evt_path,
 620                                 event_type_descriptors[PERF_TYPE_TRACEPOINT+1]);
 621                 }
 622                 closedir(evt_dir);
 623         }
 624
 625 cleanup:
 626         closedir(sys_dir);
 627 }
 628
 629 /*
 630  * Print the help text for the event symbols:
 631  */
 632 void print_events(void)
 633 {
 634         struct event_symbol *syms = event_symbols;
 635         unsigned int i, type, op, prev_type = -1;
 636         char name[40];
 637
 638         fprintf(stderr, "\n");
 639         fprintf(stderr, "List of pre-defined events (to be used in -e):\n");
 640
 641         for (i = 0; i < ARRAY_SIZE(event_symbols); i++, syms++) {
 642                 type = syms->type + 1;
 643                 if (type >= ARRAY_SIZE(event_type_descriptors))
 644                         type = 0;
 645
 646                 if (type != prev_type)
 647                         fprintf(stderr, "\n");
 648
 649                 if (strlen(syms->alias))
 650                         sprintf(name, "%s OR %s", syms->symbol, syms->alias);
 651                 else
 652                         strcpy(name, syms->symbol);
 653                 fprintf(stderr, "  %-40s [%s]\n", name,
 654                         event_type_descriptors[type]);
 655
 656                 prev_type = type;
 657         }
 658
 659         fprintf(stderr, "\n");
 660         for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
 661                 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
 662                         /* skip invalid cache type */
 663                         if (!is_cache_op_valid(type, op))
 664                                 continue;
 665
 666                         for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
 667                                 fprintf(stderr, "  %-40s [%s]\n",
 668                                         event_cache_name(type, op, i),
 669                                         event_type_descriptors[4]);
 670                         }
 671                 }
 672         }
 673
 674         fprintf(stderr, "\n");
 675         fprintf(stderr, "  %-40s [raw hardware event descriptor]\n",
 676                 "rNNN");
 677         fprintf(stderr, "\n");
 678
 679         print_tracepoint_events();
 680
 681         exit(129);
 682 }